This is accomplished via a water aerosol emitter in the hollow pillar.

They had found nothing but hollow pillars.

Water from the roof is collected in a concealed gutter and transferred via the structure to drain down the centre of the hollow pillars.

As the lava continued flowing towards lower ground in the Mývatn area, the top crust collapsed, but the hollow pillars of solidified lava remained.

A portion, however, was placed in the hollow pillar of a crypt, and saved.

The pavilion has a sophisticated drainage system which channels rain water through four hollow pillars.

The main portion of the tower is a hollow concrete hexagonal pillar containing the stairwells and power and plumbing connections.

They joined, forming for an instant a tremendous hollow pillar far down in whose center we stood.

This dining hall, with its hollow pillar and tiny posts, took up but half the cabin's end.

Closing the door, The Shadow went to the hollow pillar and stowed away the wrapping.